Thaum cov neeg feem coob hnov 'precision casting foundry', lawv daim duab flawless, ci iab hlau qhov ncaj tawm ntawm daim ntawv qhia. Qhov ntawd yog thawj qhov kev xav tsis zoo. Qhov tseeb yog ntau ntxiv txog kev tswj hwm kev sib haum xeeb - tswj cov cua sov, kev ntxhov siab, thiab kev coj tus cwj pwm hauv ib txoj hauv kev uas ua rau koj nyob ze rau qhov zoo tshaj plaws li kev lag luam. Nws tsis yog khawv koob; nws yog kev sib tsoo ntawm cov txheej txheem tswj.
Lub Plhaub Game: Ntau tshaj Xuab Zeb
Siv lub plhaub molding. Lub npe ua rau nws suab yooj yim, zoo li dipping ib qho qauv hauv cov xuab zeb thiab kua nplaum. Tab sis dab ntxwg nyoog nyob rau hauv cov ceramic slurry muaj pes tsawg leeg thiab stucco xuab zeb cov nplej faib. Tau txais qhov viscosity tsis raug los ntawm ob peb lub vib nas this ntawm Zahn khob, thiab koj lub plhaub thickness yuav tsis sib haum. Kuv tau pom batches qhov twg ib sab ntawm lub plhaub tau zoo tag nrho, lwm qhov tawg thaum lub sij hawm dewaxing vim lub tsho loj tsis zoo. Nws yog ib qho txuj ci tactile-koj kawm los txiav txim qhov slurry los ntawm qhov nws drips, tsis yog los ntawm cov ntaub ntawv.
Qhov no yog qhov uas keeb kwm ua haujlwm ntev tseem ceeb. Ib lub tuam txhab zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), nrog ntau tshaj 30 xyoo nyob rau hauv casting thiab machining, muaj feem yuav hlawv los ntawm ntau txhiab tus slurry qauv. Tej zaum lawv tau txiav txim siab los ntawm kev sib xyaw ua ke uas suav nrog Qingdao qhov tshwj xeeb humidity swings, uas tuaj yeem ua rau muaj kev puas tsuaj rau lub voj voog ziab. Koj tsis tau txais qhov ntawd los ntawm lub khw tshiab.
Qhov kev sim tiag tiag yog nrog cov cores nyuaj. Rau ib qho kev tso cua txias sab hauv hauv lub cev lub cev, cov tub ntxhais yuav tsum tau tiv taus hlau siab tab sis tseem yuav tsum tau muab tshem tawm. Peb ib zaug siv tus txheej txheem silica xuab zeb core rau txoj haujlwm stainless hlau. Cov hlau nkag mus rau hauv cov tub ntxhais, tsim kom muaj qhov sib xyaw ua ke uas siv hnub EDM kom tshem tawm. Qhov kho? Hloov mus rau zircon xuab zeb sib tov rau nws qis thermal expansion. Ib qho kev hloov khoom me me, tus nqi khaws cia loj yuav zam.
Kev nqis peev Casting: Ciab thiab Tos
Kev nqis peev casting yog tus menyuam daim ntawv tshaj tawm rau qhov tseeb, tab sis nws qhov kev poob loj tshaj plaws yog lub sijhawm. Txhua txheej ntawm ceramic plhaub yuav tsum tau qhuav kom huv si. Rush nws, thiab koj tau txais cov pa tawg thaum lub sij hawm nchuav - hu ua 'plhaub tawg' - tawm hauv koj nrog cov pwm uas muaj cov khoom seem hlau thiab ceramic shrapnel. Lub sijhawm voj voog yog tus thawj coj, tsis yog tus npaj.
Wax qauv sib dhos yog lwm daim duab kos duab. Rau lub turbine hniav pawg, qhov vuam ntawm cov rooj vag wax yog ua los ntawm tes. Tus neeg teb xov tooj nrog lub cuab yeej kub kov lub wax; kub heev, thiab nws melts cov hniav nyias trailing ntug; txias heev, thiab cov weld tsis muaj zog, ua rau cov qauv detachment thaum lub plhaub tsev. Nws yog ib qho txuj ci uas siv ntau xyoo. Kuv nco qab mus saib hauv pem teb qhov chaw uas cov welder zoo tshaj plaws tuaj yeem ua 72-tus qauv ntoo hauv ib nrab lub sijhawm ntawm kev ntiav tshiab, nrog xoom rework. Qhov kev ua tau zoo ncaj qha txhais mus rau yield.
De-waxing yog ib qho tseem ceeb, feem ntau overlooked kauj ruam. Txoj kev qub yog flash firing, uas txaus ntshai lub plhaub tawg. Tam sim no, feem ntau cov foundries siab heev, nrog rau cov uas muaj kev koom ua ke CNC machining zoo li QSY, siv lub tshuab nqus tsev autoclaves siab. Qhov ua kom yuam kev yog lub siab-kub nkhaus. Nws yuav tsum tau yaj cov quav ciab los ntawm sab hauv tawm yam tsis tsim thermal shock. Lawv lub website, tsi.com, hais txog lawv txoj haujlwm nrog cov nickel-based alloys. Cov alloys feem ntau muaj cov txheej txheem nruj nruj, lub ntsiab lus ntawm cov pwm pwm ua ntej yuav tsum yog qhov tseeb. Lub flawed de-wax uas micro-cracks lub plhaub yuav ua rau hlau infiltration, ruining saum npoo tiav thiab ua tom qab cam khwb cia machining npau suav phem.
Khoom siv yog Txoj Cai
Koj tham tsis tau ib precision casting qhov chaw tsis tau tob rau hauv metallurgy. Carbon steel, stainless-lawv coj txawv txawv. Tab sis cov alloys tshwj xeeb yog qhov chaw uas muaj kev txawj ntse tiag tiag. Siv cobalt-based alloys, zoo li Stellite. Lawv tau nchuav rau ntawm qhov kub thiab txias heev thiab muaj qhov tsis zoo los tsim cov theem nyuaj, nkig yog tias txias tsis raug.
Peb muaj ib qhov project rau lub nplhaib hnav-resistant sealing. Cov ntawv luam tau hu rau qhov tshwj xeeb Rockwell C hardness. Thawj lub ncuav, siv tus txheej txheem txias txias, yog mos heev los yog tawg. Qhov teeb meem yog pwm lub thermal loj. Peb yuav tsum tsim cov phiaj xwm txias txias-tooj tooj liab tso rau hauv pwm-rau kev taw qhia kev ruaj khov ntawm cov hlau, yuam kom nws txias los ntawm qhov tseem ceeb sab nraud. Nws ua haujlwm, tab sis nws ntxiv ob hnub rau lub sijhawm pwm tsim. Qhov no yog qhov kev sib pauv tsis tu ncua: precision vs. nqi vs. txhuas lub sijhawm.
Qhov no yog qhov uas tus neeg muag khoom cov ntaub ntawv keeb kwm yog qhov tseem ceeb. Ib lub tuam txhab thov ntawm kev ua hauj lwm nrog npib tsib xee-raws li alloys yog ib yam, tab sis muaj ib tug cav ntawm kev vam meej pours rau lub Cheebtsam nyob rau hauv nruj ib puag ncig (xav tias tshuaj twj tso kua mis impellers) yog lwm. Nws txhais tau hais tias lawv tau daws qhov rooj vag thiab nce cov teeb meem tshwj xeeb rau cov alloys 'shrinkage qauv.
CNC: Qhov twg Casting ntsib kev muaj tiag
Tsis muaj cam khwb cia yog tiag tiag 'net-zoo' nyob rau hauv lub siab-precision siab. Qhov ntawd yog qhov sib xyaw CNC machining ua tsis-negotiable. Qhov txiaj ntsig loj tshaj plaws ntawm qhov chaw tsim khoom nrog rau hauv tsev machining yog cov lus qhia. Thaum tus kws kho tshuab tho rau hauv qhov casting thiab pom ib qho chaw nyuaj los yog lub qhov pore, cov ntaub ntawv ntawd ncaj qha rov qab mus rau pawg melting.
Kuv nco qab ib pawg ntawm cov hlua hlau txuas. Lawv machined zoo nkauj tsuas yog rau ib lub ces kaum ntawm txhua qhov chaw uas cov cuab yeej yuav chatter. Nws tau dhau los ua qhov sib txawv me ntsis ntawm qhov txias txias nyob rau hauv lub ces kaum ntawm cov pwm, tsim kom muaj thaj tsam ntawm cov ntsiab lus pearlite ntau dua. Pab pawg foundry tau kho cov cua txias ntawm cov pwm, thiab qhov teeb meem ploj mus. Yog tsis muaj machining nyob rau hauv tib lub ru tsev, qhov kev tawm tswv yim voj yuav siv sij hawm ntau lub lis piam.
Rau ib lub tuam txhab zoo li QSY, muab ob qho tib si casting thiab machining txhais tau tias lawv tuaj yeem tswj cov datum. Lawv tuaj yeem muab pov rau hauv cov ntaub qhwv los yog cov khoom lag luam ntxiv hauv qhov chaw meej paub meej tias lawv cov CNC yuav tom qab tuav thiab txiav ib feem. Qhov kev sib koom ua ke no yog qhov tseem ceeb rau cov geometry nyuaj uas cov nyiaj siv ua haujlwm yuav tsum muaj tsawg heev tab sis zoo sib xws kom tsis txhob txiav rau hauv phab ntsa.
Cov Failures uas Qhia
Lub sij hawm qhia ntawv tshaj plaws yog los ntawm tej yam tsis raug. Thaum ntxov, peb muaj kev ntseeg dhau los ntawm kev simulation software rau solidification. Peb tau khiav ib simulation rau lub bronze valve vaj tsev, thiab nws pom zoo meej noj. Cov castings tiag tiag muaj loj shrinkage kab noj hniav nyob rau hauv tuab flange. Qhov kev simulation tsis suav nrog kev hloov pauv me ntsis hauv peb cov alloy qhov tseeb thermal conductivity. Peb poob batch. Zaj lus qhia? Simulation yog ib tug qhia, tsis yog ib tug yaj saub. Koj tseem yuav tsum tau txiav tawm thawj tsab xov xwm casting, ntu nws, etch nws, thiab saib cov nplej. Tsis muaj kev hloov pauv rau kev kuaj kev puas tsuaj.
Lwm qhov ua tsis tau zoo yog kev ua haujlwm dhau ntawm cov txheej txheem. Peb ib zaug sim ua kom siv cov purity ultra-high-purity argon ntxuav rau melting stainless hlau kom txo tau cov kev suav. Nws ua haujlwm, tab sis tus nqi nce yog 300%. Ib feem tsis xav tau; standard degassing yog txaus. Tus spec yog rau lub twj tso kua mis dav dav, tsis yog cov khoom siv dav hlau. Paub tias thaum twg 'zoo txaus' yog qhov tseeb 'zoo meej' rau daim ntawv thov yog kev txiav txim siab tshaj lij uas cais cov kev paub txog kev paub los ntawm kev xav.
Yog li, dab tsi ua ib qho kev ntseeg siab precision casting qhov chaw zoo li? Nws tsis yog ib qho nrog daim ntawv qhia flashiest. Nws yog ib qho uas tuaj yeem piav qhia, hauv kev nthuav dav, vim li cas lawv siv qhov kub thiab txias rau 17-4PH stainless, los yog lawv tsim lawv cov ntoo siv quav ciab kom txo tau qhov kub ntxhov rau txhuas. Nws yog tus uas nws lub vev xaib, zoo li QSY's, ncaj qha sau nws cov peev txheej tseem ceeb-plhaub molding, peev casting, machining, thiab cov npe tshwj xeeb ntawm cov ntaub ntawv-tsis muaj kev thov siab. Nws qhia txog kev tsom mus rau repeatability tshaj txuj ci tseem ceeb. Hauv kev lag luam no, qhov ntawd tsuas yog qhov tseeb uas tseem ceeb tiag tiag.
